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Résultats de la recherche (393 résultats)

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  • Land use ; Landslide ; Model ; Multivariate analysis ; Natural hazards ; Principal components analysis ; Satellite imagery ; Slope ; Slovenia ; Vegetation
  • images were merged using Principal Component Analysis method and classified with an unsupervised classification. Using multivariate statistical analysis (factor analysis), the interaction between factors and landslide distribution were tested
  • , and the importance of individual factors for landslide occurrence was defined. The results show that the slope, the lithology, the terrain roughness, and the cover type play important roles in landslide susceptibility.
  • 2006
  • Analysis of factors determining sediment yield variability in the highlands of northern Ethiopia
  • Arid area ; Environmental management ; Ethiopia ; Gully erosion ; Lithology ; Mountain ; Regression analysis ; Sediment budget ; Soil erosion ; Spatial variation ; Vegetation ; Watershed
  • In this study, reservoir sedimentation and corresponding catchment attribute data were used to investigate the major factors controlling sediment yield variability in a mountainous dryland region of northern Ethiopia. Sediment yield data were
  • 2006
  • Migrant versus indigenous farmers. An analysis of factors affecting agricultural lan use in the transitional agro-ecological zone of Ghana, 1984-2000
  • 2006
  • Assessing the effect of environmental and anthropogenic factors on land-cover diversity in Mediterranean mountain environment
  • Biodiversity ; Biogeography ; Geographical information system ; Human impact ; Mediterranean area ; Model ; Mountain ; Multivariate analysis ; Navarra ; Spain ; Vegetation
  • This study assesses the factors that influence land-cover diversity, including the specific contributions of environmental and anthropogenic forces in determining landscape diversity (spatial variability in climate, lithological variations and human
  • diversity was divided into environmental and human-influenced fractions, and generalized additive models within a GIS framework were used to evaluate the effects of environmental and anthropogenic factors.
  • 2006
  • This article presents the sky-view factor computation. The sky-view factor is an important dataset for a natural process modeling, but it can also be used in many applications that are based on visibility analyses. Visible areas of the Earth's
  • surface are usually determined regarding a single chosen point, but this method allows one to generate a raster whose cells contain generalized data about the sky visibility. The computation is based on the contextual analysis of the DEM, thus results
  • 2006
  • Driving factors of forest landscape change in Yiluo River basin
  • Agricultural land use ; China ; Deforestation ; Forest ; Henan ; Landscape dynamics ; Slope gradient ; Spatial analysis ; Village ; Watershed
  • 2006
  • Tillage erosion : a review of controlling factors and implications for soil quality
  • Agricultural practice ; Bibliography ; Cultivated land ; Erosion rate ; Isotope analysis ; Nutrient ; Simulation ; Soil ; Soil erosion ; Soil properties
  • 2006
  • Calculation of the cosmogenic nuclide production topographic shielding scaling factor for large areas using DEMs
  • Digital elevation model ; Erosion rate ; Isotope analysis ; Methodology ; Topography ; United Kingdom ; Watershed
  • 2006
  • Spatial and temporal variations and controlling factors of potential evapotranspiration in China : 1956-2000
  • and the temporal trends of the regional means for 10 major river basins and whole China are analyzed. Through a partial correlation analysis, the major climate factors which affect the temporal change of the potential evapotranspiration are analyzed. Decline
  • 2006
  • Factors determining the spatial diversification of the SAPARD funds absorption level in Kujawsko-Pomorskie voivodship
  • The paper concerns the spatial differentiation and determinants of absorption of European Union funds in the frame of SAPARD program in the Kujawsko-Pomorskie province. The analysis on one side includes numerous evaluation elements of the absorption
  • level of the SAPARD funds by the districts. The above mentioned elements of the analysis are presented taking into account the distribution for the separate SAPARD activity. - (BJ)
  • 2006
  • In this study, 263 samples were taken from the section for grain-size analysis, 25 for chemical analysis, ii for C 14 dating and 6 for scanning electron microscope (SEM). The results indicate that 3 types of the sediments in the section can
  • be identified. The Ejin Section has recorded the repeated dust-storms or sandstorms since 2500 yr BP and these peak periods are consistent with the records of dust rains in historical literatures, indicating that the change of climate is a key factor to increase
  • sandstorms or dust-storms, whreas, artificial factor may only be an accelerating one for desertification.
  • 2006
  • Regional and structural factors in Swedish regional growth during the 1990s
  • Centre-périphérie ; Croissance économique ; Economie régionale ; Emploi ; Industrie ; Shift-share analysis ; Suède
  • Core-periphery ; Economic growth ; Employment ; Industry ; Regional economy ; Shift-share analysis ; Sweden
  • 2006
  • Cultural geography ; Cultural studies ; Factor analysis ; Netherlands (The) ; Quantitative analysis
  • 2006
  • Hydrological regime ; Model ; Mountain ; Overland flow ; Slope gradient ; Soil erosion ; Spatial analysis ; Tanzania ; Vegetation ; Water erosion ; Watershed
  • This study assessed the ability of several models to locate areas affected by severe erosion and identified the factors controlling the distribution of erosion in a catchment characterized by a dynamic Hortonian hydrologic regime. The spatial
  • with the spatial distribution of some erosion factors : overland flow, slope, crust, canopy cover and ground cover.
  • 2006
  • An epidemiology of neighborhood poverty : causal factors of infant mortality among Black and Whites in the metropolitan United States
  • Ethnic community ; Health ; Infant mortality ; Living standard ; Model ; Poverty ; Regression analysis ; Segregation ; United States of America ; Urban district
  • 2006
  • of the radius of curvature:width ratio. This neglected factor helps resolves paradoxes relating to observed changes in sediment transport and channel stability. When viewed over smaller time and space scales, analysis of dynamics using fixed reach boundaries
  • This paper presents an analysis of the planform behaviour of the Lower Mississippi River (LMR) using a series of maps and hydrographic surveys covering the period 1765-1975. The analysis highlights the importance of meander geometry, in the form
  • 2006
  • Social accounting and regional economic planning : an integrated model for policy analysis and optimisation
  • Economic sector ; Factor of production ; Gross domestic product ; Iran ; Living standard ; Matrix analysis ; Regional economy ; Wage inequality
  • 2006
  • Several factors influencing glacier mass balance vary with slope aspect. Their effects can be measured by either vector analysis of the number of glaciers with each aspect, or Fourier regression of glacier altitude, or size against aspect. Both
  • 2006
  • Migration to urban and rural destinations in post-Soviet Estonia : a multilevel event-history analysis
  • Economic restructuring ; Estonia ; Ethnicity ; Internal migration ; Labour market ; Migration factor ; Post-communism ; Social change ; Social integration
  • 2006
  • Ardenne ; Belgium ; Forecast ; Landslide ; Multivariate analysis ; Regression analysis ; Slope ; Slope dynamics ; Thematic map
  • will have the same causal factors as the landslides initiated in the past. Significant model results were obtained, with pre-landslide hillslope gradient and 3 different clayey lithologies being important predictor variables. Receiver Operating
  • 2006